85637925 has 72 divisors (see below), whose sum is σ = 167499200. Its totient is φ = 42888960.

The previous prime is 85637917. The next prime is 85637927. The reversal of 85637925 is 52973658.

It is a happy number.

85637925 is a `hidden beast` number, since 8 + 5 + 637 + 9 + 2 + 5 = 666.

It is not a de Polignac number, because 85637925 - 2³ = 85637917 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85637927) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 194856 + ... + 195294.

Almost surely, 2^85637925 is an apocalyptic number.

85637925 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

85637925 is a deficient number, since it is larger than the sum of its proper divisors (81861275).

85637925 is a wasteful number, since it uses less digits than its factorization.

85637925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492 (or 464 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The square root of 85637925 is about 9254.0761289283. The cubic root of 85637925 is about 440.7801671709.

It can be divided in two parts, 856 and 37925, that added together give a triangular number (38781 = T₂₇₈).

The spelling of 85637925 in words is "eighty-five million, six hundred thirty-seven thousand, nine hundred twenty-five".